<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数" type="warning" show-icon  :closable="false" > </el-alert>
        <!-- 选择商品分类区 -->
        <el-row class="cat_opt">
            <el-col>
                <span>选择商品分类：</span>
                <!-- 选择商品分类的级联选择器 -->
                <el-cascader
                    expand-trigger="hover"
                    :options="catelist"
                    :props="cateProps"
                    v-model="selectedCateKeys"
                    @change="handleChange">
                </el-cascader>
            </el-col>
        </el-row>
        <!-- tab 页签区域 -->
        <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <!-- 添加动态参数的面板 -->
            <el-tab-pane label="动态参数" name="many">
              <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible =true" >添加参数</el-button> 
            <!-- 动态参数表格 -->
              <el-table :data="manyTableData" border stripe>
                <el-table-column type="expand" >
                  <template slot-scope="scope">
                    <el-tag v-for="(item,i) in scope.row.attr_vals " :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                    <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm"
                        @blur="handleInputConfirm(scope.row)"
                      >
                    </el-input>
                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                  </template>
                </el-table-column>
                <el-table-column type="index" label="#" ></el-table-column>
                <el-table-column label="参数名称" prop="attr_name" ></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                      <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                      <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
            <!-- 添加静态参数的面板 -->
            <el-tab-pane label="静态属性" name="only">
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible =true">添加属性</el-button>
            <!-- 静态参数表格 -->
            <el-table :data="onlyTableData" border stripe>
              <el-table-column type="expand" >
                <template slot-scope="scope">
                  <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                  <el-input
                      class="input-new-tag"
                      v-if="scope.row.inputVisible"
                      v-model="scope.row.inputValue"
                      ref="saveTagInput"
                      size="small"
                      @keyup.enter.native="handleInputConfirm"
                      @blur="handleInputConfirm(scope.row)"
                    >
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                </template>
              </el-table-column>
                <el-table-column type="index" label="#" ></el-table-column>
                <el-table-column label="属性名称" prop="attr_name" ></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                      <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)" >编辑</el-button>
                      <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
              </el-tab-pane>
        </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%" @close="addDialogClosed" >
      <!-- 添加参数的对话框 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
          </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
      </el-dialog>
      <!-- 修改参数的对话框 -->
      <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%" @close="editDialogClosed" >
      <!-- 修改参数的对话框 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
          </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
      </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
        catelist: [],
        cateProps: {
            value: 'cat_id',
            label: 'cat_name',
            children: 'children'
        },
        selectedCateKeys: [],
        activeName: 'many',
        manyTableData: [],
        onlyTableData: [],
        addDialogVisible: false,
        addForm: {
          attr_name:'',

        },
        addFormRules: {
          attr_name: [
            { required: true, message: '请输入参数名称', trigger: 'blur' }
          ]
        },
        editDialogVisible: false,
        editForm: {},
        editFormRules: {
          attr_name: [
            { required: true, message: '请输入参数名称', trigger: 'blur' }
          ]
        },
        inputVisible: false,
        inputValue: ''


    }
  },
  created() {
      this.getCateList()
  },
  methods: {
    async getCateList(){
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) return this.$message.error('请求商品分类数据失败')
        this.catelist = res.data
        console.log(this.catelist)
    },
    async handleChange(){
        this.getParamsDate()
    },
    handleTabClick(){
        
        this.getParamsDate()
    },
    async getParamsDate(){
      if (this.selectedCateKeys.length !== 3) {
            this.selectedCateKeys = []
            this.manyTableData= []
            this.onlyTableData= []
            return
        }
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{ params: { sel: this.activeName}})
        
        if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')

        
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
          item.inputVisible= false
          item.inputValue= ''
        })

        console.log(res.data)
        if (this.activeName === 'many') {
          this.manyTableData = res.data
        }else{
          this.onlyTableData = res.data
        }
    },
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    addParams(){
      this.$refs.addFormRef.validate( async valid =>{
        if (!valid) return
        const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,{ attr_name: this.addForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) return this.$message.error('添加参数失败')
        this.$message.success('请求参数成功')
        this.addDialogVisible = false
        this.getParamsDate()
      })
    },
    async showEditDialog(attr_id){
      const { data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{ params: { attr_sel: this.activeName }})
      if (res.meta.status !== 200) this.$message.error('请求参数数据失败')
      this.editForm= res.data
      this.editDialogVisible= true
      
    },
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    editParams(){
      this.$refs.editFormRef.validate( async valid =>{
        if (!valid) return
        const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name: this.editForm.attr_name ,attr_sel: this.activeName})
        if (res.meta.status !== 200) return this.$message.error('更新参数失败')
        this.$message.success('修改参数成功')
        this.getParamsDate()
        this.editDialogVisible= false
      })
    },
    async removeParams(attr_id){
      const confirmresult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err =>{
          err
        })
        if (confirmresult !== 'confirm') {return this.$message('已经取消了删除!') }
        const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
        if (res.meta.status !== 200) return this.$message.error('删除失败')
        this.$message.success(res.meta.msg)
        this.getParamsDate()
        this.editDialogVisible= false
    },
    async handleInputConfirm(row){
      if (row.inputValue.trim().length === 0) {
          row.inputValue = ''
          row.inputVisible= false
          return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue= ''
      row.inputVisible= false
      this.saveAttrVals(row)
    },
    showInput(row){
      row.inputVisible= true
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus()
        })
    },
    handleClose(i, row){
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    },
    async saveAttrVals(row){
      const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{ attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ')})
      if (res.meta.status !== 200) return this.$message.error('修改参数失败')
      this.$message.success('修改参数成功')
    }

  },
  computed: {
    // 按钮是否被禁用
   isBtnDisabled(){
    if (this.selectedCateKeys.length !== 3) {
        return true
    }
     return false
   },
   cateId(){
     if (this.selectedCateKeys.length == 3) {
       return this.selectedCateKeys[2]
     }
     return null
   },
   titleText(){
     if (this.activeName === 'many') {
       return '动态参数'
     }
     return '静态参数'
   }
  }

}
</script>

<style lang="less" scoped>
.cat_opt{
    margin: 15px 0;
}
.el-tag{
  margin: 5px;
}
.input-new-tag{
  width: 120px;
}
</style>
